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android immerge navigation bar & status bar

system bars
https://developer.android.com/training/system-ui/immersive.html
http://niorgai.github.io/2016/03/20/Android-transulcent-status-bar/


if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    float[] floats=new float[3];    getWindow().setNavigationBarColor(Color.HSVToColor(0,floats));    getWindow().setStatusBarColor(Color.HSVToColor(0,floats));    this.findViewById(Window.ID_ANDROID_CONTENT).setSystemUiVisibility(
            View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN| 
                    View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);}
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go url encoding

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go golang get disk usage free space remain info

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